Cardiac Check Navy Lt. Lucy Shi uses a stethoscope to check the heart rate of a simulated patient during a mass casualties exercise at Camp Lemonnier, Djibouti, Jan. 26, 2022. SHARE: Download: Full Size (5.29 MB) Tags: Navy Credit: Navy Petty Officer 1st Class Jacob Sippel VIRIN: 220126-N-AW702-0014C.JPG Photo Gallery